In 1974, to rave reviews, Porsche produced the 930/911 Turbo to the public and set off on a new road. At the same time, the governing body of motorsport introduced a new 'silhouette' formula to sports car racing. Thus the immortal 934 and 935 were born. This book tells the story of the 911 Turbo and its racing cousins, from the 1974 2.1-liter RSR Turbo Carrera to the tube-framed 750 horsepower final variants of the 935. These are the cars which still bring a gleam of pleasure to any of the drivers lucky enough to have sampled their enormous power and, sometimes, their wayward handling!